Final Flash is one of Vegeta's signature attacks (together with Galick Gun and Big Bang Attack), and
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supposedly the most powerful of all Vegeta's attacks. In order to perform this technique, Vegeta draws his hands back and gathers up all of his energy. Then, he thrusts his palms forward and discharges a massive golden-yellow beam of energy towards his opponent.
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Vegeta gathers energy for the Final Flash

This move was first used by Vegeta during his battle against Perfect Cell, but to no avail. Though Cell was significantly more powerful, the incredible amount of energy that Vegeta put into the attack, reflected by significant charge time, nearly obliterated the overconfident Cell as well as the entire Earth. Cell was taunted into standing still and take the blast's full force. Sensing the danger only at the last second, Cell attempted to dodge the beam as the destructive energy disintegrated the ground on which he stood and continued off into deep space. When the dust cleared, Cell had lost half of his upper torso (he was also shocked that the attack was actually able to damage him). Despite this, and to Vegeta's surprise, Cell has been able to regenerate himself and continue the fight.